Thermal protection test is the current demand for safety testing of fire and flame resistance of daily necessities, with the development of society, the protection of heat-resistant flame retardant fabrics is getting more and more attention. To protect the human body from the flame or reduce the flame damage to the human body, the fabric is required to have not only flame resistance, but also excellent heat insulation, which puts forward higher requirements for textile enterprises, and the inquiry and improvement of thermal protection testing is further deepened.
At present, there are many kinds of instruments on the market for textile thermal protection testing, and for different industries with different testing needs, the standard summary of the following common types of thermal protection testing instruments.
Contact heat resistance tester.
Contact heat resistance tester is mainly used to test the ability of firefighting clothing, thermal protection gloves, or similar firefighting thermal protection materials to resist high temperature contact heat. By testing the material under a certain pressure and a certain temperature heating body contact, record the time used to increase the temperature of the material 10 ℃, the critical time to determine the ability of the material to resist high-temperature contact heat. The contact heat resistance tester can quickly and accurately obtain the high temperature contact critical time of the material, so as to quantitatively determine the ability of the material to resist high temperature contact heat, so as to guide the development and performance evaluation of thermal protection materials.
EN 702, EN 12477, EN 407, ISO 12127
Scope of application.
Applicable to firefighting clothing, thermal protective gloves and related materials for thermal protection performance testing.
Thermal radiation fire performance tester.
Thermal radiation ignition performance tester according to the provisions of GB/T14523-2007 and the use of TESTech cone calorimeter heating cone technology combined with the specific requirements of GB/T14523 integrated design. Equipment mainly contains radiation cone. Ignition system. Gas supply system. Calibration system. Temperature control system, etc.
Conform to the standard.
Scope of application.
This test is applicable to construction materials.
Thermal radiation melt-drop tester.
According to the French construction materials and railroad vehicles flame retardant test standard NF P92-505 developed, while meeting the EU 95/28/EC automotive interior materials fire test standard requirements; the principle of the test through the upper radiation heat source on the specimen 30KW/m2 thermal radiation effect, which may trigger the release of gas combustion; specimens produce molten drops; fiber cotton combustion.
Conformity to standards.
NF P92-505. EU 95/28/EC and other standards
1. Stainless steel heat emitter bracket, can be rotated 90 degrees, easy to quickly test, equipped with specimens from the heat radiation device height gauge, easy to adjust the height of the test.
2. Epiradiator heat radiation device, can provide 30KW/m2 heat radiation flux.
3. Panel display thermal radiation device operating power value, eliminating the need for frequent calibration procedures, power controller control radiation output.
4. Adjustable thermal radiation device radiation flux, equipped with specimens and cotton trays, height adjustable and can easily evacuate the radiation source.
Fabric thermal protection (radiation) performance tester.
Thermal protection performance tester for the determination of single-layer or multi-layer fabrics in high-temperature environment against thermal radiation performance
Thermal protection performance tester is used to determine the single-layer or multi-layer fabrics in a high temperature environment thermal radiation performance. Thermal radiation resistance is an important performance index of flame retardant products, accurate determination of its protective properties, for the selection of materials. Research and development of new products. Improve the processing technology has important guidance significance.
Method A: The sample is mounted in a separate frame and exposed to the heat radiation source for a certain period of time. The intensity of the thermal radiation is controlled by adjusting the distance between the sample and the radiation source. After the test, the visual changes of the sample at all levels are examined.
Method B: The sample is fixed to the calorimeter and exposed to the heat radiation source. The time required for the calorimeter temperature to rise by 12°C and 24°C was measured separately.
On the basis of these data, the heat flux rate is calculated from the difference in the density of the transmitted and incident heat flow. The cooling system is provided by a continuous flow of water from the inlet and outlet ports on the tester.
SPT Protective Clothing Fabric Heat Resistance Tester (subjected to molten metal droplet impact).
Testing the protective performance of materials exposed to molten metal
A steel rod in a steel cone is heated in a furnace to 600°C. The heated steel cone is placed on a calorimeter and a device on top of the sample. When the magnetic switch is triggered, the molten metal drops onto the surface of the sample. The calorimeter records the starting temperature.Z high temperature and the temperature Zda difference. The calorimeter needs to be set to 20°C before and after the test. Calculation and standardized evaluation.
Thermal conductivity tester for protective clothing.
Conformity with standards.
DIN/EN 702 ISO 12127-1
Measurement of the contact heat flux of protective clothing and materials
Before the experiment, the heating cylinder is heated to the specified temperature and the specimen is mounted on a calorimeter. The calorimeter is moved towards the heated cylinder at a speed of 5 mm/s and after contact, a load of 45 N is applied. A 10°C temperature rise time threshold is measured with the calorimeter. The temperature of the heated cartridge can be adjusted from room temperature to 500°C.
MMS protective clothing metal molten bead splash tester.
Conforms to standards.
Evaluation of material resistance to liquid metal splash performance
During the test, an appropriate amount of molten metal is sputtered onto the sample placed at an angle. A PVC film is attached to the back of the sample and comes into contact with it. The damage is evaluated by recording the changes in the PVC film after the sputtering process. Depending on the test results, the test is repeated using larger or smaller amounts of metal until the PVC film is less damaged by Z.
A furnace with induction coil and high frequency generator melts the metal. A high-performance fiber optic two-color pyrometer is used for temperature control and measurement of the sputtering temperature. Temperature controller adjusts the temperature between 700°C and 1800°C. Stepper motors control the tilt speed and tilt angle. The cooling unit uses a water stream connected to the inlet and outlet of the unit for cooling.
TPP convective heat source (open flame) performance tester ：
Conforms to standards.
ISO 9151/EN 367
Exposes protective materials to a flame to detect the amount of heat passing through. Used to determine the fire resistance of textiles. Fire protection products and other materials for fire performance.
A horizontally fixed sample is exposed to a propane burner flame with an impact heat flow density of 80 kW/m2 and the heat passing through the specimen is measured with a calorimeter. The time required for a rise of 12°C and 24°C in the calorimeter, respectively, was measured. The heat transfer index is the average of the results of three specimens. The device consists of a burner. The cover plate and the calorimeter with the specimen gripper. The device is controlled by a software-controlled pneumatic unit. The software contains the calculation and evaluation methods specified by the standard. The software also controls the propane gas delivery switch. For safety reasons, the burner is also equipped with an electronic pilot flame safety.
The entire test process can be controlled on a WINDOWS computer platform, including calibration. Starting the test. Any time to terminate the test and change the software settings, the temperature during the test in the form of graphs and charts in real time; after the test, the data can be analyzed, and save the test and print reports.
Protective clothing against molten metal spatter impact performance tester.
Conformity to standards.
After the welding wire is melted by the burner, it drops onto a point of the sample which is fixed vertically. The number of drops is counted until the temperature of the temperature sensor behind the sample rises to 40°C. The burner is adjusted by a mass flow meter with a manual adjustment valve which controls the melting rate of the welding wire.